" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
17=17
[15-(-9)] - 7 = 15-[(-9)-7]
15 + 9 - 7 = 15 + 9 + 7
24 - 7 = 24 + 7
17 = 31